fix: add company dashboard greeting fallback

[MolhamHamwi]

Summary

• Adds a safe fallback for the company dashboard greeting when the company name is missing or blank
• Preserves the existing greeting when a company name is set

Verification

• pnpm typecheck
• pnpm test
• pnpm --filter frontend exec eslint app/app/company/page.tsx

Closes #70

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Pull request overview

Adds a safe UI fallback for the company dashboard greeting so users without a populated company name no longer see an “undefined” placeholder in the header.

Changes:

• Derives a companyName display value using company.name?.trim() with a "there" fallback.
• Updates the dashboard hero title to render companyName instead of company.name.

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